organic compounds
1-(2,3,4-Trihydroxybenzylidene)-4-ethylthiosemicarbazide
aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: mjamil@um.edu.my
In the title molecule, C10H13N3O3S, the thiosemicarbazide =N—NH—C(=S)—NH– fragment is twisted with respect to the aromatic ring [dihedral angle = 20.5 (1)°]. A weak N—H⋯S hydrogen bond [3.480 (1) Å] links two molecules about a center of inversion to generate a ring. The hydroxy groups are engaged in intermolecular hydrogen bonding; the O—H⋯O and O—H⋯S hydrogen bonds generate a layer motif.
Related literature
For the crystal structures of 3,4-dihydroxybenzaldehyde 4-ethylthiosemicarbazone and 2,4-dihydroxybenzaldehyde 4-ethylthiosemicarbazone, see: Kayed et al. (2008); Tan et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 software (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536810014078/pk2241sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810014078/pk2241Isup2.hkl
2,3,4-Trihydroxybenzaldehyde (1.54 g, 10 mmol) and 4-ethylthiosemicarbazide (1.19 g, 1 mmol) were heated in ethanol (20 ml) for 2 hours; acetic acid (0.5 ml) was also added. A brown solid separated from the cool solution; this was recrystallized from methanol.
Carbon-bound H-atoms were placed in calculated positions (C—H 0.95 to 0.98 Å) and were included in the
in the riding model approximation, with U(H) set to 1.2 or 1.5U(CMe).The amino and hydroxy H-atoms were located in a difference Fourier map, and were refined with distance restraints of N–H 0.86±0.01 and O–H 0.84±0.01 Å; their temperature factors were freely refined.
For the crystal structures of 3,4-dihydroxybenzaldehyde 4-ethylthiosemicarbazone and 2,4-dihydroxybenzaldehyde 4-ethylthiosemicarbazone, see: Kayed et al. (2008); Tan et al. (2008).
Data collection: APEX2 software [SMART?] (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. Thermal ellipsoid plot (Barbour, 2001) of C10H13N3O3S at the 70% probability level; hydrogen atoms are drawn as spheres of arbitrary radius. |
C10H13N3O3S | F(000) = 536 |
Mr = 255.29 | Dx = 1.452 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 5730 reflections |
a = 7.5668 (5) Å | θ = 2.4–28.3° |
b = 14.6754 (10) Å | µ = 0.28 mm−1 |
c = 10.8700 (7) Å | T = 100 K |
β = 104.711 (1)° | Prism, colorless |
V = 1167.50 (13) Å3 | 0.30 × 0.20 × 0.10 mm |
Z = 4 |
Bruker SMART APEX diffractometer | 2660 independent reflections |
Radiation source: fine-focus sealed tube | 2364 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.026 |
ω scans | θmax = 27.5°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −9→9 |
Tmin = 0.921, Tmax = 0.973 | k = −19→19 |
10870 measured reflections | l = −14→13 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.029 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.082 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0437P)2 + 0.4981P] where P = (Fo2 + 2Fc2)/3 |
2660 reflections | (Δ/σ)max = 0.001 |
174 parameters | Δρmax = 0.34 e Å−3 |
5 restraints | Δρmin = −0.22 e Å−3 |
C10H13N3O3S | V = 1167.50 (13) Å3 |
Mr = 255.29 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.5668 (5) Å | µ = 0.28 mm−1 |
b = 14.6754 (10) Å | T = 100 K |
c = 10.8700 (7) Å | 0.30 × 0.20 × 0.10 mm |
β = 104.711 (1)° |
Bruker SMART APEX diffractometer | 2660 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2364 reflections with I > 2σ(I) |
Tmin = 0.921, Tmax = 0.973 | Rint = 0.026 |
10870 measured reflections |
R[F2 > 2σ(F2)] = 0.029 | 5 restraints |
wR(F2) = 0.082 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.34 e Å−3 |
2660 reflections | Δρmin = −0.22 e Å−3 |
174 parameters |
x | y | z | Uiso*/Ueq | ||
S1 | 0.70929 (4) | 0.59538 (2) | 0.58991 (3) | 0.01292 (10) | |
O1 | 0.50792 (13) | 0.28115 (6) | 0.03429 (8) | 0.0153 (2) | |
O2 | 0.54351 (14) | 0.26317 (6) | −0.20701 (9) | 0.0176 (2) | |
O3 | 0.73079 (14) | 0.39064 (6) | −0.30899 (9) | 0.0167 (2) | |
N1 | 0.73526 (15) | 0.49383 (7) | 0.26113 (10) | 0.0133 (2) | |
N2 | 0.69204 (15) | 0.50533 (7) | 0.37631 (10) | 0.0132 (2) | |
N3 | 0.91494 (16) | 0.61386 (8) | 0.42338 (11) | 0.0150 (2) | |
C1 | 0.66760 (17) | 0.42305 (8) | 0.05845 (12) | 0.0114 (2) | |
C2 | 0.59670 (17) | 0.34728 (8) | −0.01603 (12) | 0.0114 (2) | |
C3 | 0.61719 (17) | 0.33861 (8) | −0.13940 (12) | 0.0122 (2) | |
C4 | 0.71179 (18) | 0.40505 (8) | −0.18813 (12) | 0.0123 (2) | |
C5 | 0.78291 (17) | 0.48082 (9) | −0.11516 (12) | 0.0134 (3) | |
H5 | 0.8474 | 0.5261 | −0.1486 | 0.016* | |
C6 | 0.75918 (17) | 0.48975 (8) | 0.00612 (12) | 0.0127 (2) | |
H6 | 0.8059 | 0.5421 | 0.0550 | 0.015* | |
C7 | 0.64158 (17) | 0.43394 (8) | 0.18633 (12) | 0.0124 (2) | |
H7 | 0.5559 | 0.3969 | 0.2138 | 0.015* | |
C8 | 0.77826 (17) | 0.57177 (8) | 0.45530 (12) | 0.0118 (2) | |
C9 | 1.01416 (19) | 0.69298 (9) | 0.48851 (13) | 0.0168 (3) | |
H9A | 1.1456 | 0.6869 | 0.4917 | 0.020* | |
H9B | 1.0020 | 0.6951 | 0.5770 | 0.020* | |
C10 | 0.9416 (2) | 0.78045 (10) | 0.42107 (17) | 0.0283 (4) | |
H10A | 1.0080 | 0.8323 | 0.4678 | 0.042* | |
H10B | 0.8112 | 0.7863 | 0.4171 | 0.042* | |
H10C | 0.9584 | 0.7795 | 0.3346 | 0.042* | |
H1O | 0.472 (3) | 0.2409 (11) | −0.0195 (16) | 0.039 (6)* | |
H2O | 0.554 (3) | 0.2673 (15) | −0.2817 (11) | 0.045 (6)* | |
H3O | 0.731 (3) | 0.4420 (9) | −0.343 (2) | 0.047 (6)* | |
H2N | 0.5992 (17) | 0.4785 (11) | 0.3933 (15) | 0.021 (4)* | |
H3N | 0.936 (2) | 0.5975 (11) | 0.3531 (11) | 0.023 (4)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.01775 (18) | 0.01251 (16) | 0.00958 (16) | −0.00113 (11) | 0.00547 (12) | −0.00111 (10) |
O1 | 0.0228 (5) | 0.0130 (4) | 0.0113 (4) | −0.0065 (4) | 0.0064 (4) | −0.0022 (3) |
O2 | 0.0281 (5) | 0.0147 (5) | 0.0114 (5) | −0.0064 (4) | 0.0078 (4) | −0.0041 (4) |
O3 | 0.0259 (5) | 0.0153 (5) | 0.0110 (5) | 0.0000 (4) | 0.0089 (4) | 0.0007 (3) |
N1 | 0.0157 (5) | 0.0150 (5) | 0.0104 (5) | −0.0001 (4) | 0.0056 (4) | −0.0018 (4) |
N2 | 0.0155 (5) | 0.0149 (5) | 0.0109 (5) | −0.0040 (4) | 0.0063 (4) | −0.0028 (4) |
N3 | 0.0185 (6) | 0.0158 (5) | 0.0126 (5) | −0.0046 (4) | 0.0075 (4) | −0.0047 (4) |
C1 | 0.0116 (6) | 0.0122 (5) | 0.0103 (6) | 0.0016 (4) | 0.0024 (4) | 0.0003 (4) |
C2 | 0.0118 (6) | 0.0105 (5) | 0.0124 (6) | 0.0007 (4) | 0.0038 (5) | 0.0015 (4) |
C3 | 0.0144 (6) | 0.0109 (6) | 0.0109 (6) | 0.0011 (5) | 0.0023 (5) | −0.0012 (4) |
C4 | 0.0137 (6) | 0.0144 (6) | 0.0096 (6) | 0.0034 (5) | 0.0042 (5) | 0.0009 (4) |
C5 | 0.0132 (6) | 0.0129 (6) | 0.0144 (6) | −0.0004 (5) | 0.0040 (5) | 0.0027 (5) |
C6 | 0.0127 (6) | 0.0118 (6) | 0.0126 (6) | −0.0003 (5) | 0.0016 (5) | −0.0010 (5) |
C7 | 0.0138 (6) | 0.0111 (6) | 0.0128 (6) | 0.0005 (5) | 0.0042 (5) | 0.0002 (4) |
C8 | 0.0140 (6) | 0.0104 (5) | 0.0110 (6) | 0.0015 (5) | 0.0028 (5) | 0.0011 (4) |
C9 | 0.0182 (7) | 0.0164 (6) | 0.0167 (6) | −0.0067 (5) | 0.0060 (5) | −0.0043 (5) |
C10 | 0.0201 (8) | 0.0167 (7) | 0.0444 (10) | −0.0032 (6) | 0.0012 (7) | 0.0005 (6) |
S1—C8 | 1.7092 (13) | C1—C6 | 1.4007 (17) |
O1—C2 | 1.3707 (15) | C1—C7 | 1.4613 (17) |
O1—H1O | 0.827 (9) | C2—C3 | 1.3944 (17) |
O2—C3 | 1.3669 (15) | C3—C4 | 1.3914 (17) |
O2—H2O | 0.838 (9) | C4—C5 | 1.3923 (17) |
O3—C4 | 1.3738 (15) | C5—C6 | 1.3811 (17) |
O3—H3O | 0.841 (9) | C5—H5 | 0.9500 |
N1—C7 | 1.2819 (16) | C6—H6 | 0.9500 |
N1—N2 | 1.3824 (14) | C7—H7 | 0.9500 |
N2—C8 | 1.3523 (16) | C9—C10 | 1.511 (2) |
N2—H2N | 0.866 (9) | C9—H9A | 0.9900 |
N3—C8 | 1.3244 (17) | C9—H9B | 0.9900 |
N3—C9 | 1.4639 (16) | C10—H10A | 0.9800 |
N3—H3N | 0.853 (9) | C10—H10B | 0.9800 |
C1—C2 | 1.3996 (17) | C10—H10C | 0.9800 |
C2—O1—H1O | 109.3 (15) | C6—C5—H5 | 120.2 |
C3—O2—H2O | 109.6 (15) | C4—C5—H5 | 120.2 |
C4—O3—H3O | 107.5 (15) | C5—C6—C1 | 121.26 (11) |
C7—N1—N2 | 115.99 (11) | C5—C6—H6 | 119.4 |
C8—N2—N1 | 118.43 (11) | C1—C6—H6 | 119.4 |
C8—N2—H2N | 118.7 (11) | N1—C7—C1 | 119.47 (11) |
N1—N2—H2N | 122.0 (11) | N1—C7—H7 | 120.3 |
C8—N3—C9 | 125.59 (11) | C1—C7—H7 | 120.3 |
C8—N3—H3N | 116.0 (12) | N3—C8—N2 | 116.93 (11) |
C9—N3—H3N | 117.8 (12) | N3—C8—S1 | 123.94 (10) |
C2—C1—C6 | 118.47 (11) | N2—C8—S1 | 119.13 (10) |
C2—C1—C7 | 120.84 (11) | N3—C9—C10 | 111.14 (11) |
C6—C1—C7 | 120.66 (11) | N3—C9—H9A | 109.4 |
O1—C2—C3 | 120.30 (11) | C10—C9—H9A | 109.4 |
O1—C2—C1 | 119.11 (11) | N3—C9—H9B | 109.4 |
C3—C2—C1 | 120.59 (11) | C10—C9—H9B | 109.4 |
O2—C3—C4 | 122.81 (11) | H9A—C9—H9B | 108.0 |
O2—C3—C2 | 117.46 (11) | C9—C10—H10A | 109.5 |
C4—C3—C2 | 119.72 (11) | C9—C10—H10B | 109.5 |
O3—C4—C3 | 116.43 (11) | H10A—C10—H10B | 109.5 |
O3—C4—C5 | 123.27 (11) | C9—C10—H10C | 109.5 |
C3—C4—C5 | 120.30 (12) | H10A—C10—H10C | 109.5 |
C6—C5—C4 | 119.63 (12) | H10B—C10—H10C | 109.5 |
C7—N1—N2—C8 | −175.71 (11) | O3—C4—C5—C6 | −179.39 (12) |
C6—C1—C2—O1 | 179.53 (11) | C3—C4—C5—C6 | 0.03 (19) |
C7—C1—C2—O1 | −2.47 (18) | C4—C5—C6—C1 | 1.21 (19) |
C6—C1—C2—C3 | 0.05 (18) | C2—C1—C6—C5 | −1.25 (19) |
C7—C1—C2—C3 | 178.06 (11) | C7—C1—C6—C5 | −179.26 (12) |
O1—C2—C3—O2 | 0.95 (18) | N2—N1—C7—C1 | 174.75 (11) |
C1—C2—C3—O2 | −179.58 (11) | C2—C1—C7—N1 | 167.00 (12) |
O1—C2—C3—C4 | −178.31 (11) | C6—C1—C7—N1 | −15.04 (18) |
C1—C2—C3—C4 | 1.16 (19) | C9—N3—C8—N2 | 173.77 (12) |
O2—C3—C4—O3 | −0.96 (18) | C9—N3—C8—S1 | −7.36 (19) |
C2—C3—C4—O3 | 178.26 (11) | N1—N2—C8—N3 | −8.18 (17) |
O2—C3—C4—C5 | 179.58 (12) | N1—N2—C8—S1 | 172.89 (9) |
C2—C3—C4—C5 | −1.20 (19) | C8—N3—C9—C10 | −97.70 (16) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1o···O2 | 0.83 (1) | 2.26 (2) | 2.717 (1) | 115 (2) |
O1—H1o···S1i | 0.83 (1) | 2.55 (1) | 3.291 (1) | 150 (2) |
O2—H2o···O3 | 0.84 (1) | 2.31 (2) | 2.745 (1) | 112 (2) |
O2—H2o···O1ii | 0.84 (1) | 2.07 (1) | 2.832 (1) | 151 (2) |
O3—H3o···S1iii | 0.84 (1) | 2.36 (1) | 3.189 (1) | 170 (2) |
N2—H2N···S1iv | 0.87 | 2.62 | 3.480 (1) | 171 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x, −y+1/2, z−1/2; (iii) x, y, z−1; (iv) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C10H13N3O3S |
Mr | 255.29 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 7.5668 (5), 14.6754 (10), 10.8700 (7) |
β (°) | 104.711 (1) |
V (Å3) | 1167.50 (13) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.28 |
Crystal size (mm) | 0.30 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Bruker SMART APEX diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.921, 0.973 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10870, 2660, 2364 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.029, 0.082, 1.04 |
No. of reflections | 2660 |
No. of parameters | 174 |
No. of restraints | 5 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.34, −0.22 |
Computer programs: APEX2 software [SMART?] (Bruker, 2009), SAINT (Bruker, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1o···O2 | 0.83 (1) | 2.26 (2) | 2.717 (1) | 115 (2) |
O1—H1o···S1i | 0.83 (1) | 2.55 (1) | 3.291 (1) | 150 (2) |
O2—H2o···O3 | 0.84 (1) | 2.31 (2) | 2.745 (1) | 112 (2) |
O2—H2o···O1ii | 0.84 (1) | 2.07 (1) | 2.832 (1) | 151 (2) |
O3—H3o···S1iii | 0.84 (1) | 2.36 (1) | 3.189 (1) | 170 (2) |
N2—H2N···S1iv | 0.87 | 2.62 | 3.480 (1) | 171.4 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x, −y+1/2, z−1/2; (iii) x, y, z−1; (iv) −x+1, −y+1, −z+1. |
Acknowledgements
The authors thank the University of Malaya (grant No. PS354/2009) and MOHE (grant No. FRGS-FP001/2009) for supporting this study. HBS thanks the Libyan People's Bureau in Malaysia for a scholarship.
References
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